基于二维材料-超材料的太赫兹调制器及关键技术研究

According to the new demand for tunable function devices in the field of terahertz apllication, we combine the intriguing physical properties in two-dimensional materials and easy construction in artificial metamaterial structure to propose the composite sub-wavelength metamaterial and metasurface structure based on the new two-dimensional materials of molybdenum disulfide and black phosphorus. New types of modulator, which have the characteristics of good control and reconstruction, are developed. By modulating the specific response with terahertz wave interaction, we plan to investigate the transmission and modulation mechanism in our made devices, and the key technology in the design and fabrication. Through the controlling of amplitude, frequency, phase, and polarization, it is expected to realize the tunable and reconfigurable THz modulation devices. This work could help us not only to breakthrough terahertz technology but also to integrate and apply the multifunctional devices.

针对太赫兹应用领域对可调控功能器件的新需求，结合二维材料的多种新奇的物理特性和人工超材料结构易构造性，提出基于二硫化钼、黑磷等新型二维材料复合亚波长超材料和超表面结构。研制多种调控方式相结合的，具有优良调控特性和可重构特性的调制器。通过调控与太赫兹波相互作用的特异光学响应，研究太赫兹可调器件涉及的传输与调控的物理机制、器件设计与加工的关键技术。通过对振幅、频率、相位和偏振的调控，实现可调控太赫兹调制器件将有助于太赫兹领域的技术突破和多功能器件的集成和应用。

针对太赫兹应用领域对可重构多功能太赫兹器件的新需求，结合二维材料的多种新奇的物理特性和人工超材料结构的易构造性，提出基于二维材料和超材料的太赫兹调制器。首先研究了不同基底上的单层以及多层二维材料在太赫兹波段的光学特性以及外场调控特性，探究二维材料与基底之间的电荷转移以及载流子动力学行为。同时通过结构设计以及电磁耦合特性制备超材料，研究其对太赫兹波的有效调控。进一步研制具有优良调控特性和可重构特性的复合材料太赫兹调制器，研究在外场激励下对振幅、相位、透过谱、偏振等调制信息，进而通过物理模型进行计算，分析它们之间的耦合机制。基于二维材料的复合超材料THz 功能器件的高效、动态调控可为实现可重构器件的提供设计思路，有助于太赫兹领域的技术突破和多功能器件的集成和应用。